大阪湾の小型底曳網におけるマアナゴの網目選択性

DOI 日本農学文献記事索引 Web Site 被引用文献18件
  • 西川 哲也
    兵庫県立水産試験場 兵庫県農林水産部水産課
  • 反田 實
    兵庫県立水産試験場 兵庫県但馬水産事務所試験研究室
  • 長浜 達章
    兵庫県立水産試験場 兵庫県但馬水産事務所試験研究室
  • 東海 正
    東京水産大学

書誌事項

タイトル別名
  • Mesh Selectivity of Small Trawl for White-spotted Conger in Osaka Bay.
  • オオサカワン ノ コガタ ソコビキアミ ニ オケル マアナゴ ノ アミメ セン

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説明

The small otter trawl fisheries in Osaka Bay use cod-end of small mesh size of about 20mm in stretch measure, since their target species are white-spotted conger Conger myriaster and small shrimps e. g. the southern rough Shrimp Trachypenaeus curvirostris. Many juveniles, which play an important role for future resource control, are caught and discarded at sea immediately after net hauling because most of these juveniles are smaller than the commercial size.<br> This paper describes the mesh selectivity for white-spotted conger. Fishing experiments were carried out using an existing trawl with cover net in July and October 1991. The trawl used had a cod-end of four mesh sizes (21.2, 22.5, 25.0, and 27.0mm) and the mesh size of the cover net was 15.3mm.<br> Mesh selectivity for white-spotted conger is shown as a function of G/P (body girth/mesh perimeter). Mesh selectivity increases at G/P=1, reaching 100% at a G/P of about 1.25. This indicates that white-spotted conger can pass through a mesh of slightly smaller perimeter than their own body girth.

収録刊行物

  • 日本水産学会誌

    日本水産学会誌 60 (6), 735-739, 1994

    公益社団法人 日本水産学会

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